Single Sign-On (SSO) is an authentication method that permits users to sign in using only one account and gain access to a variety of applications or services without having to enter their credentials every time. It simplifies the user experience as well as increases security when it is implemented correctly.

Benefits:

• User Convenience: One login for multiple services.
• Reduced Password Fatigue: Fewer passwords to remember.
• Centralized Management: Easier for organizations to enforce policies (e.g., password resets, MFA).
• Enhanced Security: Fewer weak/reused passwords. Risks are concentrated but can be mitigated with MFA.

Examples:

• Google Workspace: Log in once to access Gmail, Drive, and YouTube.
• Enterprise SSO: Employees access email, HR tools, and internal apps with one login.
• Social Login: Using Facebook/Apple credentials to sign into third-party apps.